I've just published draft #4 of SRFI 164.  It was submitted by Per
Bothner, author of the SRFI.

<https://srfi.schemers.org/srfi-164/>

Here's the diff:

<https://github.com/scheme-requests-for-implementation/srfi-164/compare/68daf6bb7d8c071355a81fd0f0e8c9d449c4e2c1...d7508dd231e2eb75d12d5553ec618fbe8ec6a04e>

We're eager to have feedback before last call is announced.

Regards,

SRFI Editor